U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Purcell Branch

Usage:

Purcell Branch Formation (VA*)


Geologic age:

Cambrian*
Ordovician*


Type section, locality, area and/or origin of name:

Exposures along Purcell Branch from State Route 643 N to Occoquan River, and roadside ditches near the intersection of Purcell Branch and Route 643, Independent Hill 7.5-min quadrangle, Prince William Co., VA (Pavlides, 1989).


AAPG geologic province:

Piedmont-Blue Ridge province*


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).